Textile apparatus



Aug.' 13,1935. w, POOL ETAL 2,010,889

TEXTILE APPARATUS Firled Jan. 28, 1952 FlGl uwzfghlr 14 zu Z1.- 12.

threads.

Patented Aug. 13, 1935 ffr''isNr omer.

l l ,ammessa TEXTILE APPARATUS william Pesi near Derby, England,assignors and VLeonard. `lhatham, Spenden,

to Celanese Corporation of America, arcorporation of DelawareApplication january vZ8, 1932,`-Serial-No. 589,426

f VIn Great Britain March 19, 1931 3 claims. `(ci. 1319;;125)

. This inventionrelates to looms andis particularly concerned withshuttleless looms ofthe type wherein a dummy shuttle is employed tocarry a pre-formed loop through the shed of the'warp It is an object ofthis invention to provide an improved form of dummy shuttle for use inlooms of this type. Y Y

The dummy shuttle employed for this purpose normally comprises a solidbody having `usually the general shape of an ordinary shuttle, andcarrying two horns which point in opposite directions lengthwise of theshuttle, and are adapted to catch the weft loop at the side of the loomand enable the shuttle to carry it through the` shed. With suchshuttles, there is a tendency, particularly when artificial and otherspringy yarns` are being used, for the weft to jump'out oi engagementwith the horns, with theresult that itis not laid properly in the shed.It is a particular object of the invention to devise a shuttle in whichthis disadvantage is avoided.

According to the invention, in a dummy shuttle for use in shuttlelesslooms the space between a weft engaging horn and the body of the shuttleis formed with a constriction which readily permits the passage of aweft loop 'during its engagement by the horn, but prevents the loop fromspringing out after its engagement.

Thus, a spring or tooth may be formed either on the horn or the shuttlebody or on both so as partially to close the passage between the hornand the shuttle against the return of the loop, while allowing the loopto pass it smoothly and without hindrance as the horn enters the loop.Such a projection is arranged to present an angle to the weft, in whichthe weft is caught if it attempts to pass out of engagement with thehorn. Thus, there may be provided on the body of the shuttle or on thehorn a projection which causes the passage oiered to the weft toconverge towardsthe base of the horn, and which, beyond the narrowestpoint of the passage, falls away sharply. The projection may constrictthe passage or the weit loop against its return by arranging that theprojection enters a groove while leaving a space for the weft topassduring its engagement by the horn. ThisY groove is formed in the shuttlebody when the projection is formed on the horn, and on the horn when theprojection is on the shuttle body.

The invention will now be described in greater detail with reference tothe accompanying drawing, but it is to be understood that thisdescription is given by way of illustration only and is in no waylimitative.

-Figure 1 is a side elevation in part section and Figure 2 a plan of adummy shuttle according to the invention. f I I Figures 3, 4,5 and 6 aresections across the lines 3-.-:3, .cl- 4, 5 5, and 6-5 respectively onFigure f2.

u Figures 7 and 8 are a side elevation and vplan respectively of aportion of a further form of dummyshuttle according to the invention.

Figure 9 is a. side elevation in part section of a portion of afurtherorm of dummy shuttle ac` cording `to the invention. Y Referringto Figures l to 6, the dummy shuttle illustrated comprises a wooden bodyII having steel tips l2: and provided with a broad groove i3 along theupper side of the body II. I Two 1horns I4 are attached at their basesI5 by means of screws i6 to the top of the shuttle. The horns I4 curveround from their bases l5 to the side I1 of the shuttle away from thereed as the shuttle passes through the shed, the horns I4 being bentround to lie ilush with theside I1 and then passing along .the lengthofthe shuttle in the groove I3. Oblique slots I8 are thus formed betweenthe shuttle and the horn on the side of the shuttle away from the reed,the slots I8 sloping downwardly towards the mid-point of the shuttle andcommunicating at their lower ends through a space I9 with the under sideof the shuttle and at their upper ends with the groove I3 on the top ofthe shuttle at points near the Shanks of the horns dummy shuttle andpasses under the tip of the horn I4 by means of which one limb of theloop which is held at the selvedge is conducted down the groove i8 tothebottom of the shuttle, the free end of weft coming out through the spaceI9 between the curve of the horn and the body of the shuttle and runningback along the groove 24 in the middle portion of the shuttle body. The

under side of the shuttle is channelled as indicated at 2) to allow thefree passage of the weft beneath the shuttle and to permit it to bepulled taut from the selvedge, so that the proper tension is applied tothe weft and a good selvedge is formed. This feature is especiallyadvantageous in the weaving of smooth and slippery yarns, such asartificial silk yarns, to which, on account of their smoothness, it isdifcult to impart the correct tension.

In order to prevent the weft thread from coming out of its engagementunder the horn I4, a. tooth 2 I is provided beneath the tip of eachshuttle horn, which tooth restricts the passage between the tip of thehorn I4 and the bottom of the groove I4. The weft loop is presented tothe.

I3, and prevents the weft, once engaged, from returning. If desired, thetooth 2l may be inserted on the shuttle body beneath the tip of thehorn, instead of being disposed on the underside of the horn itself.

For the purpose of preventing the free end of the weft loop from ridingup the edge of the groove I3 in the top of the shuttle and fallingbetween the shuttle and the reed, the side of the groove nearest thereed may be undercut so as to present an overhanging edge 26. If anyspringiness of the weft thread causes it to be pressed against the side25 of the groove I3, it cannot ride up the side of the groove and overthe edge of the shuttle on account of the overhanging edge 26. Thus thedanger of disturbing the path of the shuttle by the engagement of thefree end or" the weft between the shuttle and the reed and thepossibility of damaging the weft or warp threads thereby is eliminated.The overhanging edge above referred to is particularly clearlyV seen inFigures 3 to 6. Y

Crevices in the shuttle body are avoided and all projections arecarefully rounded off so that if the shuttle should turn in the shed,there is no danger' of its catching the warps. For the same reason, theShanks of the horns I4 are caused to lie flush with the side Il' of theshuttle, while the tips of the horns lie wholly within the groove I3.

In Figures '7 and 8 a tooth 28 is provided on the base I5 of the hornand projects into a hole 29 on the shank of the horn opposite the base,soI that the passage through which the weft is conducted is completelyclosed. The free end of the weft thread passes up from the bottom of theshuttle through the space I9, and it will be seen that in passing thetooth 28, the thread is kinked or distorted into the hole 29, the spaceIS oering no way for the thread to spring out.

In Figure 9 a tooth 2i is provided under the tip of the horn I4 as inFigures 1 to 6, but in this case a recess is provided into which thetooth 2| projects so that here also the shape of passage between thetooth 2I and the recess 30 is such as to necessitate the kinking of thethread as the thread passes in, and will not permit it to pass outagain.

What We claim and desire to secure by Letters Patent isz- 1. A dummyshuttle for use in shuttleless looms comprising in combination a bodymember and a horn member attached thereto and adapted to engage apre-formed loop of weft, the passage between said members being narrowedover part of its length to form a constriction which widens rapidlytowards the point of attachment of the horn member to the body memberand less rapidly in the opposite direction, said constriction readilypermitting the passage of the weft loop during its engagement by thehorn, but preventing such loop from springing out after engagement.

2. A dummy shuttle for use in shuttleless looms comprising incombination a body member and a horn member attached thereto and adaptedto engage a pre-formed loop or weft, the passage between said membersbeing tortuous and narrowed over part of its length so as to form aconstriction which readily permits the free passage of the weft loopduring its engagement by the horn, but prevents such loop from springingout after engagement.

3. A dummy shuttle for use in shuttleless looms comprising incombination a body member and a horn member attached thereto and adaptedto engage a pre-formed loop of weft, a projection being provided on oneof said members which enters a recess in the other member, the passageso formed between said members being tortuous and narrowed over part ofits length so as to form a constriction which readily permits the freepassage of the weft loop during its engagement by the horn, but preventssuch loop from springing out after engagement.

WILLIAM POOL. LEONARD LATI-IAM.

